<template>
    <div class="login_container">
        <div class="login_box">
            <!-- 头像区域 -->
            <div class="avatar_box">
                <img src="../assets/logo.png" >
            </div>
            <!-- 登陆表单区域 -->
            <el-form  :rules="loginFormRules" ref="loginFormRef" 
            :model="loginForm" label-width="0px" class="login_form">
                <!-- 用户名 -->
                <el-form-item prop="username">
                    <el-input v-model="loginForm.username" prefix-icon="el-icon-user-solid"></el-input>
                </el-form-item>
                <!-- 密码 -->
                  <el-form-item prop="password">
                    <el-input v-model="loginForm.password"  prefix-icon="iconfont icon-3702mima" type="password"></el-input>
                </el-form-item>
                <!-- 按钮区域 -->
                 <el-form-item class="btns">
                    <el-button type="primary" @click="login" >登录</el-button>
                      <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>
export default {
    data(){
        return{
            //这是登录数据表单中数据绑定对象
            loginForm:{
                username:'admin',
                password:'123456'
            },
            // 这是表单的验证规则对象
            loginFormRules:{
                // 验证用户名是否合法
                username:[
                     { required: true, message: '请输入用户名', trigger: 'blur' },
            { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }
                ],
                // 验证密码是否合法
                password:[
                    { required: true, message: '请输入用户密码', trigger: 'blur' },
            { min: 6, max:15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
                ]
            }

        }
    },
    methods:{
        //点击充值按钮，重置登录表单
        resetLoginForm(){
            this.$refs.loginFormRef.resetFields()   
            this.loginForm.username = ''
            this.loginForm.password = '' 
        },
        //登录预验证
         login(){
             this.$refs.loginFormRef.validate(async valid => {
                if(!valid) return ;
                const {data:res} = await this.$http.post('login',this.loginForm);

                if(res.meta.status !== 200){
                   return this.$message.error('登陆失败')   
                }
                this.$message.success('登陆成功')
                //将服务器返回的token值保存到会话storage中
                window.sessionStorage.setItem('token',res.data.token);
                //跳转到home组件
                this.$router.push('/home')
            })
        }
    }
}
</script>

<style lang="less" scoped>
    .login_container{
        background-color: #2b4b6b;
        height: 100%;
    }
    .login_box{
        width:450px;
        height: 300px;
        background-color: #fff;
        border-radius: 3px;
        position: absolute;
        left:50%;
        top:50%;
        transform: translate(-50%,-50%);
 
        .avatar_box{
            height: 130px;
            width: 130px;
            border:1px solid #eee;
            border-radius: 50%;
            box-shadow: 0 0  10px #ddd;
            padding:10px;
            position: absolute;
            left:50%;
            transform: translate(-50%,-50%);
            background-color: #fff;
            img{
                width: 100%;
                height: 100%;
                border-radius: 50%;
                background-color: #eee;
            }
        }
    }
    .login_form{
        position: absolute;
        bottom:0;
        width:100%;
        padding:0 20px;
        box-sizing: border-box;
    }
    .btns{
        display: flex;
        justify-content: flex-end;
    }
</style>